Charles hodgson



(No Model.) 2 Sheets-Sheet -1.

.C.. HODGSON. CONSTRUCTION OF INGOT M OLDS.

No. 496,736. Patented May 2, 1893.

7 (No Model.) 2 sh'ets shet 2.

0. HODGSONi. TRUGTION 0P meow MOLDS' cons v No.496f736. v 1 Patented MajQyZ, 1.893. I

CHARLES HODGSON,

OF MIDDLESBROUGH, ENGLAND, ASSIGNOR AND JOHN HILL, OF SAME PLACE.

PATENT OFFICE.

o HIMSELF CONSTRUCTION OF lNGOT-IVIIOLDS.

SPECIFICATION forming part of Letters Patent No. 496,736, dated May 2,1893.

Application filed July 15, 1892- Serial No. 440,174. (No model.) Patented in France June 20, 1892, No. 222,467; in Belgium June 20, 1892,1lo. 100,180; in Germany June 21, 1892, No. 67,085; in Luxemburg June 25, 1892,No.1,6(6; in Spain July 7, 1892, No.13,465; in Canada August 23,1892,N0. 39,990, and in Austria-Hungary November l9| 1892;

- T at whom it may concern:-

Be it known that I, CHARLES Honoson, a subject of the Queen of Great Britain and Ireland, residing at Middlesbrough, in the county of York, England, have invented Improvements in the Construction of Ingot-Molds, (for which patents have been granted in the following countries: France, No. 222,467, dated June 20, 1892; Belgium,No.100,180,dated June IO 20, 1892; Luxemburg, No. 1,646, dated June 25, 1892; Austria-Hungary, No. 32,387, dated November 19, 1892; Germany, No. 67,035, dated June 21, 1892; Spain, No. 13,465, dated July 7, 1892, and Canada, No. 39,990, dated, August 23, 1892,) of which the following is a specification;

Many attempts have heretofore been made to cast ingots of iron and steel with parallel sides in order to reduce the amount of rolling or working necessary, as compared with tapered ingots, to reduce them into finished rails, bars or plates. For this purpose it has been proposed to employ parallel molds of cast iron each made in two parts adapted to be fixed together in various ways. Thus according to one construction, the two parts of the mold were hinged together at the top or at one side, and held together by a single cam or eccentric. In other constructions, the adjacent flanges or faces of the two parts of the mold have been united by a rabbet joint and held firmly together by bolts and cotters or nuts. In each case however, the construction has been such that it could not be used with practical success.

Although the constructing and uniting of the parts of the mold in such a manner as to allow of their proper expansion, appears to have been in some cases aimed at, none of the constructions of ingot molds heretofore proposed, so far as I am aware, properly provide for such expansion. Consequently when such molds have-been tried they have not been successful. Now this invention has reference to a construction of ingot mold of the kind referred to that fully provides for expansion, and obviates all the difficulties heretofore experienced with such molds; and in order that the nature of my invention may be fully understood I will proceed to explainthe same by aid of the accompanying drawings in which- Figure 1 is a side elevation; and Fig. 2 a plan of an ingot mold with parallel sides constructed according to this invention. Fig. 3

is an elevation of the inner side of part of formed with two flanges 3 and 4. The joint between each adjacent pair of flanges 3 and 4 is formed by means of longitudinal strips or projections 3 4 (hereinafter called dove tail strips) which may in effect be regarded as bevel edge projections the abutting faces 3 4 of which are beveled or inclined as shown so that the strips as seen in cross section are approximately dovetail in form. These strips 3 and 4 are formed one on each flange 3 and 4 respectively at opposite sides of the joint as shown so as to prevent molten metal escaping between them, and so as to leave an opening or space 5 between the outer portions of the flanges. The dovetail strips 3 are arranged at the inner side of the dovetail strips 4, each of these latter strips being Fig. 11 is a plan showing a slightly. 7

of such a thickness that a space 6 is left be- 4 at one side of the mold is the reverse of that at the other side, so that the two parts 1 and 2 thereof are not held together laterally but can slide past each other in the direction of the arrows a. The two halves of the mold should beconnected by hooks.

7, 7 are hooks one of which is shown separately in Figs. 4 and 5 which are elevations at right angles to each other.

7 7 a are brackets in the form of eye bolts, one of which is shown separately in Figs. 6 and 7 which are also elevations at right angles to'each other.

8, 8 are shafts passing through the hooks 7 and brackets 7 a respectively andable to be rotated therein.

9 9 are eccentrics or cams (hereinafter called cams) that are fixed on the shafts 8 and 8 respectively as shown separately in elevation in Fig. 8, and each adapted to bear against one of the flanges 3 as clearly shown in Fig. 2. One of these cams is shown separately in Figs. 9 and which are elevations at right angles-to each other. The shank 7 of each of the hooks 7 and brackets 7 is secured to its corresponding flange 4 by a nut 10 and extends through a slot 11 in the adjacent flange 3. The width 12 (Fig. 2) of these slots 11 is such that the shanks 7* passing therethrou-gh will not prevent the flange in which such slots are formed, moving in the direction of the arrows at. The shafts 8, 8 may advantageously be square, except where they fit the hooks 7 and brackets 7, and one of" them may be extended upward as shown at 8 (Figs. 1 and 2) to receive a screw key or handle by which it can be turned in order to rotate the cams 9 or 9 fixed to it, away from the flange 3 against which they normally bear and thus allow the corresponding pair of flanges 3 and at to be moved apart, it may be by the insertion of a piece of metal into the space 5 between them, should an ingot from any cause, become fixed within the mold.

It is advantageous to form the cams 9, 9 of steel, and to so arrange them that when they are pressed tightly against their respective flanges 3, the center of each of them is at a short distance from the line joining the center of the shaft on which the cam is fixed,and the point of contact of the cam with the flange 3, as shown in Fig. 2.

By the construction described and shown, when molten met-a1 is poured into the mold,- the outer portions of the flanges 3 and 4 of each pair can move toward each other in the direction of the arrows b c, and the two halves of the mold can move laterally in relation to each other in the directions of the arrows a, the friction between the flanges 3 and the cams 9, 9 owing to the small extent of bearing surface between these parts, not being suificiently great to prevent this latter movement. This is a matter of great importance. Thus it will be seen that full provision is made for the expansion of the mold, and such molds have in consequence been found very durable.

Fig. 11 shows in plan a slightly modified form of joint between the flanges 3 and 4 according to which each strip 3 extends to the outer edge of the flange 3, the space 5 between such strip and the adjacent flange 4 being of sufficient width as shown to allow of the outer portions of the flanges moving toward each other as before when the mold extracted by making the upper ends of the two parts 1 and 2 slightly thicker than the remaining parts, as shown at 13.

The number of cams 9, 9 employed,should be made to depend upon the height of the mold to which they are applied but the number should be such as to prevent/the parts of the mold between them opening by expansion and allowing molten metal to escape. For a mold five feet in height we have found three cams at each side of the mold sufficient. It will be obvious that hooks such as 7 orbrackets such as 7 a may be used at each side, but

when the rotary shafts 8, 8 are square except at the points of support, it will usually be necessary to employ one or more hooks like those shown to support the intermediate portion or portions of each shaft. We do not recommend hinges to be used as they are objectionable in practice.

WVhat I claim is 1. An ingot mold composed of flanged parts held together by means of eccentrics or cams 9, 9 that act against one of the flanges of each pair, and fixed upon shafts, and supports held in place by the other flange of each pair, and wherein said shafts are journaled, each half of said mold being constructed with two flanges 3 and 4 one of which is made with a strip 3 and the other with a strip 4 and these parts being so arranged, relatively to each other, that when the halves of the mold are fastened together by the means referred to, spaces are formed at points 5 and 6 between the flanges at their outer parts and between the strips 4 and the flanges opposite thereto, that allow the outer portions of adjacent flanges to approach one another and the two parts of the mold to move laterally in relation to each other-substantially as herein described for the purpose set forth.

2. An ingot mold composed of two main parts united at each of two opposite sides by two flanges one of which is formed with a longitudinal bevel edged strip 3 and the other with pair and extending through slots in the second flange and rotary cams arranged to act against said second flange and fixed upon shafts journaled in said bolts substantially as herein described for the purpose specified.

3. An ingot mold composed of two main parts connected at each of two opposite sides by a joint consisting of two flanges one of which is formed with a longitudinal bevel edged strip 3 that enters a recess in the opposite flange, and the other of which is formed with a bevel edged strip 4 arranged outside of said strip 3 and so as to leave a space between it and the flange opposite to it and be-= tween the outer portions of the flanges, bolts $96,786 p r a each secured at one end to one of said flanges In testimony whereof I have signed my and extending through a slot in the second name to this specification in the presence of flange, a rotary shaft supported by the other two subscribing witnesses.

ends of said bolts, and earns fixed to said shaft CHARLES HODGSON. 5 and arranged to bear against said second Witnesses: v

flange, the strips 3 and 4 at one side of the E, W. DAWES, said mold being arranged in the reverse posi- Solicitor, Middlesbrough. tion to those at the other side of the mold R. H. COATES,

substantially as herein described for the pur- Clerk to Ward at Wethey, Solicitors, Middles- I0 pose specified. brough. 

